Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9963472d8600280d35f308d7e7b18d816cc1d9f7f7609378bd3cbd7b0462158d' 
  AND token = 'udyTPYWAU+SS++a9tvFrNVQtWnPvsW8k9tZ7H/WPZWg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}